social security number

noun

A nine-digit number issued by the Social Security Administration to citizens, permanent residents, and certain temporary workers, primarily to track people for taxation purposes, and in recent years serving as a de facto national identification number.

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Meanings

social security number1

nounsocial security number (plural social security numbers)

plural social security numbers · alternative social-security number · alternative Social Security number

  1. USA nine-digit number issued by the Social Security Administration to citizens, permanent residents, and certain temporary workers, primarily to track people for taxation purposes, and in recent years serving as a de facto national identification number.
  2. A corresponding number in other countries.

Social Security number2

nounSocial Security number (plural Social Security numbers)

plural Social Security numbers

  1. Alternative letter-case form of social security number.

Translations

Bulgarian номер на социална осигуровка
  • номер на социална осигуровка (nomer na socialna osigurovka)nine-digit number issued in the US under the Social Security Act
Chinese Mandarin 社會安全號碼 /社会安全号码
  • 社會安全號碼 /社会安全号码 (shèhuì ānquán hàomǎ)corresponding number in other countries
Finnish sosiaaliturvatunnus, henkilötunnus
  • sosiaaliturvatunnuscorresponding number in other countries
  • henkilötunnuscorresponding number in other countries
French numéro de sécurité sociale
  • numéro de sécurité socialecorresponding number in other countries
German Sozialversicherungsnummer
  • Sozialversicherungsnummercorresponding number in other countries
Hungarian tajszám
  • tajszámcorresponding number in other countries
Japanese 社会保障番号
  • 社会保障番号 (shakai hoshō bangō)corresponding number in other countries
Polish numer ubezpieczenia społecznego, numer ubezpieczenia społecznego
  • numer ubezpieczenia społecznegonine-digit number issued in the US under the Social Security Act
  • numer ubezpieczenia społecznegocorresponding number in other countries
Russian но́мер социа́льного обеспече́ния
  • но́мер социа́льного обеспече́ния (nómer sociálʹnovo obespečénija)corresponding number in other countries
Cite this entry
APA

social security number. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/social%20security%20number

MLA

“social security number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/social%20security%20number. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “social security number,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/social%20security%20number.

Source: social security number on Wiktionary, CC BY-SA 4.0.